Who is the antichrist, and when will he appear?
The antichrist will be a person in whom satan's resistance to Christ and His kingdom will culminate. He will be a man, but a man whom satan will fill to such an extent that he will be satan incarnate. The devil always seeks to mimic God's work, and his mimicking of God's work will culminate in his mimicking of the incarnation of God in Jesus Christ. The antichrist's coming will be "according to the working of satan, with all power, signs, and lying wonders, and with all unrighteous deception" ( 2 Thessalonians 2:9-10).
The antichrist will appear just prior to the second coming of Jesus Christ, and our Lord will 'consume [him] with the breath of His mouth and destroy [him] with the brightness of His coming" (verse 8).
There are already many antichrists preparing the way for the final and consummate antichrist (1 John 2:18). Indeed, everyone who denies the Father and the Son is an antichrist (verse 22), but there seems to be a special preparation for the antichrist, in whom all the forces of evil will coalesce. These forces of evil will join and be headed by one man whom he devil will especially gift and in whom he will dwell, and that man will be the antichrist.
~R. A. Torry~